Influence of the neutron-skin effect on nuclear isobar collisions at energies available at the BNL Relativistic Heavy Ion Collider

Hammelmann, Jan; Soto-Ontoso, Alba; Alvioli, Massimiliano; Elfner, Hannah; Strikman, M.

doi:10.1103/physrevc.101.061901

Cited by 39 publications

(19 citation statements)

References 61 publications

(57 reference statements)

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“…[99] show a negligible relative difference for the fireball geometric anisotropy 〈 " 〉 and a sizable difference for the square of magnetic field 〈 /0 〉. The bands indicate uncertainty arising from fluctuations and ambiguity in the initial nuclear geometry [100][101][102]. b.…”

Section: The Isobar Collision Experimentsmentioning

confidence: 99%

“…On the theory front, significant progress was made in describing chiral transport in and out of equilibrium [89][90][91][92][93][94][95][96], and in phenomenological applications for isobar collisions [97][98][99][100][101][102][103][104][105]. In particular, a state-of-the-art simulation tool, known as EBE-AVFD (event-by-event anomalousviscous fluid dynamics) [97][98][99], has been developed in the last couple of years.…”

Section: The Isobar Collision Experimentsmentioning

confidence: 99%

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Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions

Kharzeev

Liao

2020

Nat Rev Phys

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The topological structure of vacuum is the cornerstone of non-Abelian gauge theories describing strong and electroweak interactions within the standard model of particle physics. However, transitions between different topological sectors of the vacuum (believed to be at the origin of the baryon asymmetry of the Universe) have never been observed directly. An experimental observation of such transitions in Quantum Chromodynamics (QCD) has become possible in heavy-ion collisions, where the chiral magnetic effect converts the chiral asymmetry (generated by topological transitions in hot QCD matter) into an electric current, under the presence of the magnetic field produced by the colliding ions. The Relativistic Heavy Ion Collider program on heavy-ion collisions such as the Zr-Zr and Ru-Ru isobars, thus has the potential to uncover the topological structure of vacuum in a laboratory experiment. This discovery would have farreaching implications for the understanding of QCD, the origin of the baryon asymmetry in the present-day Universe, and for other areas, including condensed matter physics.

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Section: The Isobar Collision Experimentsmentioning

confidence: 99%

Section: The Isobar Collision Experimentsmentioning

confidence: 99%

Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions

Kharzeev

Liao

2020

Nat Rev Phys

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“…This signal, however, is obscured by large background effects that produce similar back-to-back correlations. Reducing this uncertainty is currently a major goal of the high energy QCD community, both on the experimental [68][69][70][71][72] and the theoretical side [18,[73][74][75]. In this context, it is of paramount importance to constrain the dynamical origin of CME signatures.…”

Section: A the Divergence Of The Chern-simons Currentmentioning

confidence: 99%

Topological charge fluctuations in the Glasma

Guerrero-Rodríguez

2019

J. High Energ. Phys.

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The early-time evolution of the system generated in ultra-relativistic heavy ion collisions is dominated by the presence of strong color fields known as Glasma fields. These can be described following the classical approach embodied in the Color Glass Condensate effective theory, which approximates QCD in the high gluon density regime. In this framework we perform an analytical first-principles calculation of the two-point correlator of the divergence of the Chern-Simons current at proper time τ = 0 + , which characterizes the early fluctuations of axial charge density in the plane transverse to the collision axis. This object plays a crucial role in the description of anomalous transport phenomena such as the Chiral Magnetic Effect. We compare our results to those obtained under the Glasma Graph approximation, which assumes gluon field correlators to obey Gaussian statistics. While this approach proves to be equivalent to the exact calculation in the limit of short transverse separations, important differences arise at larger distances, where our expression displays a remarkably slower fall-off than the Glasma Graph result (1/r 4 vs. 1/r 8 power-law decay). This discrepancy emerges from the non-linear dynamics mapping the Gaussianly-distributed color source densities onto the Glasma fields, encoded in the classical Yang-Mills equations. Our results support the conclusions reached in a previous work, where we found indications that the color screening of correlations in the transverse plane occurs at relatively large distances.

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“…The neutron skin of nuclei as an important fundamental property has attracted much attentions in traditional low energy heavy-ion physics and nuclear astrophysics [1][2][3][4][5]. Very recently the neutron skin effect was also recognized even in relativistic heavy-ion collision [6][7][8][9]. The neutron skin is usually defined as the difference between the root-mean-squared (rms) radii of neutrons and protons, i.e.…”

Section: Introductionmentioning

confidence: 99%

Effects of neutron-skin thickness on direct hard photon emission from reactions induced by the neutron-rich projectile $^{50}$Ca

Wang,

Ma,

Fang

et al. 2022

Preprint

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Direct hard photon emissions from incoherent proton-neutron bremsstrahlung in the collisions of neutron-rich projectile 50 Ca with 12 C and 40 Ca targets are simulated in the framework of IQMD model, respectively. By adjusting the diffuseness parameter of neutron density in the droplet model to obtain different neutron skin thickness for 50 Ca, the effects of neutron skin thickness on direct hard photon emission are investigated via several probes. The results show that more direct hard photons are produced with the increasing of the neutron skin thickness. Meanwhile, we find that yield ratio Rcp(σγ) and the rapidity dependence of multiplicity and multiplicity ratio Rcp(Nγ) for direct hard photons are apparently sensitive to neutron skin thickness. Furthermore, the direct hard photon differential and relative flows between central and peripheral collision are presented. We find that the differential flow is slightly more sensitive to neutron skin thickness than the relative flow. It is suggested that direct hard photon emission may be used as an experimental observable to extract the information of neutron skin thickness.

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Influence of the neutron-skin effect on nuclear isobar collisions at energies available at the BNL Relativistic Heavy Ion Collider

Cited by 39 publications

References 61 publications

Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions

Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions

Topological charge fluctuations in the Glasma

Effects of neutron-skin thickness on direct hard photon emission from reactions induced by the neutron-rich projectile $^{50}$Ca

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